1680377 has 2 divisors, whose sum is σ = 1680378. Its totient is φ = 1680376.

The previous prime is 1680373. The next prime is 1680401. The reversal of 1680377 is 7730861.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1371241 + 309136 = 1171^2 + 556^2 .

It is a cyclic number.

It is not a de Polignac number, because 1680377 - 2² = 1680373 is a prime.

It is not a weakly prime, because it can be changed into another prime (1680373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840188 + 840189.

It is an arithmetic number, because the mean of its divisors is an integer number (840189).

2^1680377 is an apocalyptic number.

It is an amenable number.

1680377 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680377 is an equidigital number, since it uses as much as digits as its factorization.

1680377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 1680377 is about 1296.2935624310. The cubic root of 1680377 is about 118.8873306861.

The spelling of 1680377 in words is "one million, six hundred eighty thousand, three hundred seventy-seven".